Clan War: End of the Rainbow (Revision 2234)

This quest can be activated on the second floor of the bar, via the recorder underneath the table. Follow the objective marker into the side room after you activate this quest. You will spot the Bagman in the room next door -- make sure to walk in slowly or you will be detected. From here, just follow the Bagman down the shaft, keeping your distance. You can't really lose him since you can just follow the objective marker on your map -- but if you get too close, the mission ends and you'll have to reactivate it back in the bar.

You'll have to drop down another shaft near some ammo boxes -- and then Mr. Bagman will get to the secret stash. Blast him away, grab his key, then loot all the cash boxes. Note that the mission ends if you insert the key and you won't be able to complete the bonus objective. So look for all the large cash boxes and make sure you've looted all 10 of them.

It's easy to get confused here as there are actually more than 10 boxes that make up the 10 stashes. There are four loot boxes on the left of Bagman's body. One is on his right, near some crates. Now head across the stream to find the others. Three are right next to the key pad. Another three are near the water (one is facing the other way, on top of one of the two crates). The final loot box is on the far right from the keypad, near the shaft you dropped down from.

Once you have inserted the key, look for the metal ramp toward the middle of this room. It'll lead up to a ledge with a loot box, containing some nice weapons, a shield, a grenade mod, and ammo.

Head back to Jimbo to turn in the mission and get yourself a weapon and some 2611 XP.